GB587328A - Process for the stabilization of cellulose ethers - Google Patents
Process for the stabilization of cellulose ethersInfo
- Publication number
- GB587328A GB587328A GB25570/44A GB2557044A GB587328A GB 587328 A GB587328 A GB 587328A GB 25570/44 A GB25570/44 A GB 25570/44A GB 2557044 A GB2557044 A GB 2557044A GB 587328 A GB587328 A GB 587328A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ethyl cellulose
- stirred
- cupric acetate
- isopropyl alcohol
- examples
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/10—Metal compounds
- C08K3/105—Compounds containing metals of Groups 1 to 3 or Groups 11 to 13 of the Periodic system
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Ethyl cellulose is stabilized against degradation by heat and oxygen by incorporating a material containing a metal of Group 1B of the Periodic Table in an amount equivalent to 0.0002 to 1 per cent of metal based on the weight of the ether. In an example, films are cast from solutions of ethyl cellulose to which copper powder and various copper salts have been added, and then heated for 16 hours to 120 DEG C. in air. A table shows the percentage retention of viscosity of the ethyl cellulose. In a second example, granular medium-viscosity ethyl cellulose is stirred with 30 per cent isopropyl alcohol and hydrated cupric acetate, whereby all the copper compound is absorbed. In examples (3) ethyl cellulose is stirred with an aqueous solution of hydrated cupric acetate, and (4) ethyl cellulose is tumbled with ground hydrated cupric acetate. In example (5), ethyl cellulose is mixed with aqueous isopropyl alcohol brought to pH 3.6 with glacial acetic acid, and then stirred with hydrated cupric acetate. The previous example is repeated in examples (6) and (7), using pH 7.1 and 8.2, respectively. In examples (8) and (9), ethyl cellulose is treated with dilute nitric acid and then stirred with 35 per cent isopropyl alcohol and cupric chloride, or cuprammonium hydroxide. In place of copper, silver and its compounds, and gold may be used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB25570/44A GB587328A (en) | 1944-12-20 | 1944-12-20 | Process for the stabilization of cellulose ethers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB25570/44A GB587328A (en) | 1944-12-20 | 1944-12-20 | Process for the stabilization of cellulose ethers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB587328A true GB587328A (en) | 1947-04-22 |
Family
ID=10229831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25570/44A Expired GB587328A (en) | 1944-12-20 | 1944-12-20 | Process for the stabilization of cellulose ethers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB587328A (en) |
-
1944
- 1944-12-20 GB GB25570/44A patent/GB587328A/en not_active Expired
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